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Basic Functions
2.5 AC Measurement
2.5.4.5
Flicker Depending on Connection Types
Table 2-17
Measured
Circuit
Quantity
Short-Term Flicker
Pst (a-n)
a-N
Pst (b-n)
b-N
Pst (c-n)
c-N
Pst (a-b)
a-b
Pst (b-c)
b-c
Pst (c-a)
c-a
Long-Term Flicker
Plt (a-n)
a-N
Plt (b-n)
b-N
Plt (c-n)
c-N
Plt (a-b)
a-b
Plt (b-c)
b-c
Plt (c-a)
c-a
Instantaneous Flicker Sensation
Pinst (a-n)
a-N
Pinst (b-n)
b-N
Pinst (c-n)
c-N
Pinst (a-b)
a-b
Pinst (b-c)
b-c
Pinst (c-a)
c-a
2.5.5
AC Operational Values
2.5.5.1
Function Description
Following basic AC operational values are gathered during measurement and shown both on the Web pages
and numerically on the display.
•
Frequency f
•
Voltage magnitudes Va, Vb, Vc, Vab, Vbc, Vca
•
Current magnitudes Ia, Ib, Ic
•
Neutral-point displacement voltage V
•
Average value of the voltages Vavg
•
Average value of the phase-phase voltages Vavg ph-ph
•
Negative-sequence unbalance ratio u2 and i2
•
Neutral current I
•
Average value of the currents Iavg
•
Phase angles φab V, φca V, φab I, φca I
56
Flicker Depending on Connection Types in Power Systems
3-Wire
Network
1-Phase
(Delta)
System
(Balanced
(1I)
x
–
–
–
–
–
–
x
–
x
–
x
x
–
–
–
–
–
–
x
–
x
–
x
x
–
–
–
–
–
–
x
–
x
–
x
N
N
3-Wire
3-Wire
Network
Network
(Delta)
(Delta)
Unbalanced
Unbalanced
(3I)
(2I)
–
–
–
–
–
–
x
x
x
x
x
x
–
–
–
–
–
–
x
x
x
x
x
x
–
–
–
–
–
–
x
x
x
x
x
x
SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022
4-Wire
4-Wire
Network
Network
(Star)
(Star)
Unbalanced
Balanced (1I)
(3I)
x
x
–
x
–
x
–
–
–
–
–
–
x
x
–
x
–
x
–
–
–
–
–
–
x
x
–
x
–
x
–
–
–
–
–
–
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